Mining-machine



I (No Models) 2 Sheets-Sheet 1. J. R. HOWELLS & G. SHELLEY.

MINING MACHINE.

Patnted June 10, 1884.

' lvv'in wes: Z5

(No Model.) I 4 2 SheetsSheet 2. J. R. HOWEL-LS & G. SHELLEY.

MINING MACHINE.

wfll J 8 Hi WHM n e 3 m ZMM 40 W 6 126a; Attorney UNITED STATES PATENT@rrren.

JOHN R. HOWELLS, OF PLYMOUTH, AND GEORGE SHELLEY, OF WILKES BARRE,PENNSYLVANIA.

MlNlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 300,076, dated June 10,1884.

Application filed September 25,1883. (No model.)

To ctZZ whom it may concern:

Belt known that we, JOHN R. HOWELLS, a

' citizen of the United States, residing at Plymouth, in the county ofLuzerne, State of Pennsylvania, and GEORGE SHELLEY, a citizen of theUnited States, residing at Wilkes Barre, in the county of Luzerne andState of Pennsylvania, have invented certain new and useful Improvementsin Mining-Machines; and we do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

Our invention relates to certain improve ments in hand-drills for minersuse, and has for its object to provide a drill which can be used eitherfor boring coal or hard rock. (it is more particularly an improvement onPatent No. 230,590,) and it consists in certain novel construction andarrangement of the various parts, whereby the'drill is made muchstronger, is more compact in form, can be manufactured cheaper, and canbe run .at a high or low rate of speed, as desired, being run at a highrate of speed when the same is used in boring soft coal, and at a lowerrate of speed, though with greater power, when used in boring rock. Thisfeature is very essential, as it prevents, to a great extent, the dangerof breakage when the drill is used in boring rock.

The particular arrangement of the various parts I will now proceed todescribe, reference being had to the accompanying drawings, and toletters of reference marked thereon, which form a part 'of thisspecification, and in Figure l is a side elevation of the drill; Fig. 2,a top plan with the upper portion of the box or frame broken away. Fig.3 is a vertical cross-section taken on line a: m, Fig. 2. Figs. 4 and 5aredetails. Fig. 6 is a plan of the stock and expansible jaws.

Referring'to said drawings, similar letters of reference indicate likeparts.

A represents the stock of the drill, having on its outer end, and formedas part of said stock, the stationary jaw B.

B is a movable jaw hinged or fulcrumed to the stationary jaw at a, andhaving the arm-or extension I), the rear end of said arm I) workingbetween the guides Z1 b on the stock A.

a are teeth or knives on the jaws B B. O is a cam mounted upon a pin, 0,which pin has its bearings in the holes 0 c in the guides I). Said earn0 operates upon the arm I), and when the cam is drawn back to the po--sition shown in Fig. 6 it expands the jaws B and B, for a purposehereinafter set forth. hen the expansion is not sufficient, the pin isinserted in the holes 0", thus bringing the fulcrum nearer the arm I),and when the cam is drawn back it expands the jaws to their fullestextent.

D is a standard or bolt which supports the operating mechanism of thedrill, and secures the same to the stock A.

E is a Hat metal plate having in one end a hole, 6, through which passesthe bolt, D. Said bolt D is keyed to the plate E, or secured to the samein any other suitable manner, and passes through a hole in the rear ofthe stock A, and is secured to said stock by a nut, (I, thus pivotingthe plate E to the stock. In this plate is a segmental slot, 0. Throughthis slot and the stock there is passed the bolt 6 on one end of whichis the thumb-nut e. By screwing up this thumb-nut the plate is firmlysecured to the stock, and by unscrewing it the plate is free to beturned to the right or left, and it can be held at any angle by turningup the screw. The bit'can thus be turned at any desired angle, andseveral holes be bored while the apparatus is fixed in one place.

F is a box or frame forming the bearing for the screw-feed shaft andoperating mechanism of the drill. Said box is formed in two parts, G andG. The lower part, G, is cast with the bolt or standard D, or may besecured to it in any other suitable manner. The upper part, G, is hingedto th part G at f f. g g are slots in one side of the part G, which fitover the lugs y g.

g g are holes in the lugs, in which holes are inserted the pins 9 g,thus securely locking the two parts together. is threaded on its innerside at 72/ h.

TI is a screw-feed having its bearing in the box F, the thread on thescrew-feed engaging with the thread in the box F. One end of saidscrew-feed is shouldered, as at h, to re- The box or frame F IOO ceiveacrank-handle. To the other end is secured in any suitable way thebit-stock h and bit h.

I is a sleeve surrounding the screwfeed H.

t t are keys 011 the screw-feed H, formed by the grooves 7t kirk on eachside of the keys Said keys fit into the key-seats k it, formed by thelugs k if k 7: on the inner side of the sleeve I, which lugs enter thegrooves 7; In. The sleeve I rests in the recessed portion K of the boxF, and is prevented from a longitudinal motion by the shoulders By thisconstruction the screw-feed revolves as the sleeve turns, and is thusfed forward or back ward, as desired. The sleeve I is provided with aworm or other gear, 0, which meshes with the worm-gearing hereinafterdescribed.

L is a shaft having its bearing in the upper part or lid, G, of the boxF. Both ends of said shaft are shouldered to receive a crank handle orhandles.

L is a pinion mounted on the shaft L.

L is a worm on said shaft L, which meshes with the gearing on the sleeveI and causes the same to revolve, and thus operate the screwfeed as theshaft L is turned. The lateral displacement of said shaft L is preventedby the collar Z, secured to the shaft in any suitable manner.

M is ashaft having its bearings in thelower part, G, of the box F, bothends of which are shouldered to receive crank-handles M is a gear-wheelmounted upon the shaft 11, and meshes with the pinion L. The lateraldisplacement of this shaft is prevented by the collar m, secured to thesame in any suit able manner.

0 is the crank-handle, formed in two parts, N and N, and having theslots N" and thumbnuts N by means of which the crank-handle can belengthened or shortened, as desired.

The operation of our device is as follows: The jaws B B are inserted ina hole made where the drilling is to be done. The cam G is drawn back tothe position shown in dotted lines, Fig. 6, the jaws are expanded, andthe teeth or knives take hold of the coal or rock, and hold the samefirmly in position.

If the drill is to be used in drilling coal, the crank is applied to theshaft M, and by turning this shaft the wheel M is revolved, which,meshing with the pinion L, turns the shaft L and worm L", which in turnmeshes with the gearing on the sleeve I, and causes the same to revolve,and thus operates the screw-feed. XVhen the drill is used in boringstone, the crank is applied to the shaft L, and the screw-feed is runwith less speed, though with greater power; or the crank can be applieddirectly to the end of the shaft.

If desired, a crank-handle can be put on each end of the shafts M and L.Vhen the hole is drilled a sufficient depth, the drill can be withdrawnby reversing the motion of the crank, or by removing the pins andraising the upper part orlid, G, lifting the screwfeed from contact withthe thread, and moving the same back to its first position.

Having thus fully described our invention, we claim as new and desire tosecure by Let ters Patent 1. In a mining-drill, the box F, supported ona suitable standard and formed in two parts, having screw-threads 011the inside, the feed-screw I-I, shouldered atone end, having its bearingin the box F, and engaging with the screw-th read in the same, and thesleeve 1', surrounding the feed-screw II, and having gearing on itsperiphery, in combination with the shaft L, shouldered at each end,having the wornrgear L and pinion L mounted on said shaft, and the shaftM, shouldered at each end, and having the gear-wheel M mounted on thesame and meshing with pinion L, all arranged and operating to the endthat the drill may be run at a high or low rate of speed, as desired.

2. In a mining-drill, the box F, supported 011 a suitable standard, andformed in two parts hinged together, having screw-threads on the inside,the feed-screw H, shouldered at one end, having its bearing in the boxF, and provided with the keys 2' iand grooves 7t, and the sleeve I,surrounding the feedscrew II, and having the lugs is", formingkey-seats, and the gearing 0 on its periphery, in combination with theshaft L, shouldered at each end, having the worm gear L and pinion Lmounted on said shaft, and the shaft M, shouldered at each end, andhaving the gear-wheel M mounted on the same and meshing with the pinionL, all arranged and operating substantially as and for the purpose shownand described.

3. In a miningdrill, the standard D, piv- I05 oted in the stock A andsecured to ,the ad justable plate E, the box F, supported by thestandard D and formed in two parts, having screw-threads on the inside,the feed-screw H, shouldered at one end, having its bearing IIO in thebox F, and the sleeve I, surrounding the feed-screw H, and havinggearing on its periphery, in combination with the shaft L, shouldered ateach end, and having the wormgear L and pinion L mounted on said shaft,and the shaft M, shouldered at each end, and having the gear-wheel Mmounted on the same and meshing with the pinion L, substantially as andfor the purpose shown and described.

In testimony whereof we affix our signatures in presence of twowitnesses.

J OHN It. HOVELLS. GEORGE SHELLEY.

lVitnesses:

ROBERT BAUR, RICHARD M. HowELLs.

